I graduated from university, swam on the Great Barrier Reef, looked upon Krakatoa, played roulette in Caesar’s Palace, and saw my children born. I value the memories of my youth. But our world gathers speed with age. Mid-life mugs you on the way home from your 40th birthday party wielding the knife of your own mortality. Terrified, we take up running, buy AC/DC tickets, wear inappropriate clothes, dye our hair, or grow silly facial hair. But the harder we cling to youth, …